Abstract: A stationary induction apparatus includes a winding formed of a plurality of winding layers disposed in a central axis direction, an insulating barrier and an insulating oil. The insulating barrier includes a first extension extending radially outwardly of the winding and partitioning the outer peripheral ends, a second extension bent from an end of the first extension, extending toward one side in the central axis direction, and covering at least a part of one outer peripheral end of the outer peripheral ends, a third extension bent from an end of the second extension and extending radially outwardly of the winding, and a fourth extension bent from an end of the third extension, extending toward the other side in the central axis direction, and covering at least a part of the other outer peripheral end of the outer peripheral ends. The fourth extension faces the second extension with a spacing therebetween.

Abstract: A lead wire support device is made of an insulator, and supports a lead wire drawn out from a winding of a stationary induction apparatus. The lead wire support device is fixed to an inner wall of a tank. A creepage path from the lead wire to the inner wall includes a first point and a second point. The first point is a point at which a creepage distance from the lead wire is a first distance. The second point is a point at which the creepage distance from the lead wire is a second distance longer than the first distance. A potential at the second point is higher than a potential at the first point.

Abstract: An impulse voltage generating device includes: an insulation cylinder; a DC power source positioned outside the insulation cylinder; capacitors arranged successively and connected to the DC power source in parallel, the capacitors being provided in a plurality of stages, the capacitors being accommodated in metal containers positioned outside the insulation cylinder; a discharging gap switch positioned in the insulation cylinder and provided between the stages; a blower structure configured to cause an insulation gas to flow in the insulation cylinder; a bushing for each of the capacitors, the bushing being positioned outside the insulation cylinder; and a gas spraying structure positioned outside the insulation cylinder, the gas spraying structure being configured to spray the insulation gas to the bushing.

Abstract: A stationary induction apparatus includes a winding formed of a plurality of winding layers disposed in a central axis direction, an insulating barrier and an insulating oil. The insulating barrier includes a first extension extending radially outwardly of the winding and partitioning the outer peripheral ends, a second extension bent from an end of the first extension, extending toward one side in the central axis direction, and covering at least a part of one outer peripheral end of the outer peripheral ends, a third extension bent from an end of the second extension and extending radially outwardly of the winding, and a fourth extension bent from an end of the third extension, extending toward the other side in the central axis direction, and covering at least a part of the other outer peripheral end of the outer peripheral ends. The fourth extension faces the second extension with a spacing therebetween.

Abstract: An impulse voltage generating device includes: an insulation cylinder; a DC power source positioned outside the insulation cylinder; capacitors arranged successively and connected to the DC power source in parallel, the capacitors being provided in a plurality of stages, the capacitors being accommodated in metal containers positioned outside the insulation cylinder; a discharging gap switch positioned in the insulation cylinder and provided between the stages; a blower structure configured to cause an insulation gas to flow in the insulation cylinder; a bushing for each of the capacitors, the bushing being positioned outside the insulation cylinder; and a gas spraying structure positioned outside the insulation cylinder, the gas spraying structure being configured to spray the insulation gas to the bushing.

Abstract: In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.

Abstract: In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.

Abstract: In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.